求翻译：运输一直被认为是对国家经济至关重要的，既要完成国家下达的客货运输任务，还要根据市场商品需求调节各自的运输，自身所创造的经济价值是十分可观的。是什么意思？

Transport has been considered vital to the national economy, we must complete the state-assigned task of passenger and freight transport, but also adjust according to market demand for their goods transportation, the economic value created by their own very considerable.

Transport has been considered the essential to the national economy, it is necessary to complete the National Order of passenger and freight transport tasks according to the market demand for commodities, but also to regulate their own transport, as well as their own creation is the economic value 1

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Transport has been considered to be critical to national economic, it is necessary to complete a national issue of passenger and freight transportation tasks, but also adjustable according to market demand for goods transport, their economic value is created by a very substantial.

Transport has been considered to be critical to national economic, it is necessary to complete a national issue of passenger and freight transportation tasks, but also adjustable according to market demand for goods transport, their economic value is created by a very substantial.